‘Uh, oh! This app isn’t used yet in your classroom ask your teacher if they can add it for you.’ if

I am a teacher. This year our county, Marion County Public Schools (in Florida), added the Khan Academy app/tile. I assigned some work, and asked my student to pull their account up to see if she (they) saw the assignments. When she (they) did, they received the quoted error above. Can you help me, please?!